You read that correctly. Apple has sold over three BILLION songs in their iTunes Music Store. And that doesn't even take into consideration all the music videos, TV shows, and feature films. This now puts iTunes ahead of both Amazon and Target, making it the third-largest music retailer in the United States. Apple's catalog now includes more than five million songs, 550 TV shows, and 500 movies. In the time it took you to read that, odds are additional new material has been posted. Currently, Apple's iTunes software is at version 7.3, so check to make certain you have the latest version installed on your Mac or Windows computer.